Metal-cutting mechanism



A. O. BOUVIER.

METAL CUTTING MECHANISM.

1j4Cj-23652O APPLICATION FILED OCT. 12, I921. Apr-1.19

2 SHEETSSHEET I.

l O "Q Wig le A. O. BOUVIER METAL CUTTING MECHANISM. APPLICATION FILED OCT. 12, 1921.

Patent/e61 Apr. 11, W22.

2 SHEETSSHEET 2- NEITE STAfi FAWN QFIFHCQ AURE o. BOUVIER, or otaaamon'r, NEW HAMPSHIRE.

METAL-CUTTING MECHANISM.

Specification of Letters Patent. Patented Apr. Ill, 1922- Applioation flled- October 12, 1921. Serial No. EMBQL To all wlrmn. it may concern Be it known that I, AURE (l. Bouvucn, a citizen of the United States, residing at (laremout, in the county of Sullivan and State of New llampshire, have invented certain new and useful Improvements in Metal place to place upon the table more expeditiously and with less effort on the part of the operator and wherein all damage or scarring Q'fthe table calculated to interfere with subsequent operations and arising from dragging otthe traction wheel, may be eliminated.

In the. accompanying drawings I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In these drawings,-

l1 ig. 1 is a plan view of a cutting mechanism;

Fig, 2 is a partial sectional view substantially on line 2-201" Fig. 1.

In this illustrathe construction I have shown a cutting mechanism of the oxy-aoetyleue type including a pantograph comprising cooperating arms 1, 2, 3, and 4 suitably pivotally connected in a well known manner and movable relative to a. pivot 5over a frame 6 on which the work is supported, a cutter mechanism. 7 of a usual type being provided on the arm 3 and supplied with a suitable mixture of oxygen and acetylene from. tanks 8 and 9 respectively, through suitable pipes. As in a usual construction, the pantograph is also motor operated, the same being driven by a motor 10 carried on a bracket 11 on the usual projecting end of the arm 2, the bracket 11 in turn being supported on a suitable traction wheel support 12 in which. a usual milled traction wheel 13 is journaled, the latter being adapted to be moved over a table 14 and relative to a suitable pattern on that table under the power of the. motor and the guidance of the operator to move the cutter mechanism 7 through a similar path relative to the work carried on the table 6.. Herein-it will be noted that the traction wheel is rotatable by the motor only in one direction, the motor 10 carrying on its armature shaft 15 a worm 16 Wl'llCll meshes with the worm gear 17 on the upper end of a vertical shaft 18 journaled 1n the member 12 and carrying a worm 19 on .its lower end which meshes with a cooperating worm gear 20 journaled on a transverse axis 21 on. the member 12 and carrying concentrically with it a spur gear 22 which meshes with a corresponding spur gear 23 on the traction wheel 13.

In the operation of such a construction, wherein the traction wheel is rotated only in one direction by the motor, certain advan tages arise from the simple form of driving mechanism re uired and the elimination of any necess1ty or motor control or reversing mechanism. However, when the operator has moved the traction wheel to the desiredlimit in the given direction, due to the looking of the worm gearing it is impossible for the average operator to draw the traction wheel back over the table 14: without dragging it upon the table and thereby materially increasing the effort required, unduly delaying the movement of the cutter to ariother position, and at the sametime as a result of this dragging movement. scarring the table to such an extent as in a very short time to interfere with subsequent accurate. movement of the traction wheel relative to the guides or patterns placed on the table and to require the purchase of a new table, which being of carefully finished metal is quite expensive.

These difiiculties are removed as a result of my invention wherein it will be noted that a bracket 24 projects laterally from the lower end of the member 12 and carries on a pivot 25 near the outer end of the bracket, a member 26, herein for example carrying a roller 27 on its lower end, which member is adapted to be thrown down into the position shown in full lines in Fig. 2 to elevate and support the traction wheel and thereby provide a transport member or trolley therefor whenever desired. More particularly, it will be noted that the member 26 cooperates with a stop 28 disposed adjacent the pivot 25, the stop preferably being so disosed as to limit the movement of the memer 26 to the right as shown in Fig. 2 and thereby cooperate with the member to proits vide a rigid support, the .weight of the motor and the other parts carried upon the member 12 acting to press the member 26 the position indicated in dotted lines, while when the member 26 is thrown to the right,

the weight of the parts tends to prevent the spring from moving the member. In order to cooperate with the member 26 and revent movement of the same beyond a desired inoperative position I also provide a suitable ,stop adapted to limit the movement of the member, this stop being herein in the form of a lug 30 formed on the upper end of the member 26 and adapted to engage with the stop 28 when the member 26 has reached its desired inoperative,position.

As a result of my improvement, it will be observed that whenever it is desired to move the pantograph in a reverse direction it is .only necessary to throw down the member 26 from its dotted to its full line position, whereupon the wheel 13 is automatically raised out of contact with the table 14 in such a manner that an operator, may move the pantograph expeditiously and freely in the reverse direction and without any scarring whatsoever of the table. Thus with my improvement not only is the work of the operator materially facilitated and the possible usefulness of the machine in a glven time speeded up, but the wear and tear on the table is eliminated thereby eliminating the difiiculties heretofore experienced in operating on a scarred table and also eliminating the frequent replacements of the expensive table which have heretofore been necessary. It will of course be evident that .\7 described one embodiment which my invention may assume in practice, it Wlll be understood that this form of the same is shown.

for purposes of illustrationand that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claimas new and desire to secure by Letters Patent is:

1. Cutting'a paratus comprising a pantograph mounte cutter mechanism including a traction motor and a traction wheel rotatable thereby, a table normall engaged by said traction wheel, and trol ey means for said traction wheel engageable at will with said table. v

.2. Cutting apparatus comprising a pantograph mounted cutter mechanism including a traction motor and a traction wheel rotatable thereby, a table normally engaged by said traction wheel, and trolley means for said traction wheel engageable at will with 4. Cutting apparatus comprising a pantograph mounted cutter mechanism including a traction motor and a traction wheel rotatable thereby, a table normally engaged by said traction wheel, trolley means for said traction wheel engageable at will with said table and including a movable roller carrying member adjustably mounted adjacent said wheel, and stop means for limiting the movement th'ereof.

5. Cutting apparatus comprising a pantograph mounted'cutter mechanism including a traction motor and a traction wheel rotatable thereby, a table normally engaged by said traction wheel, trolley means for said traction wheel engageable at will with said table and including a movable roller carrying member, resilient means normally holding said member in inoperative position, and stop means for limiting the movement of said member.

In testimony whereof I afiix my signature.

AURE o. BoUvIEn' 

